HELLO ALL.... I HOPE I CAN GET SOME HELP ON THIS MY 1986 F150 5.0 E.F.I TRUCK HAS A PROBLEM,WELL I THINK SO?? WHAT IT DOES IS IF IT IS 90 DEGREES OUTSIDE AND I START THE TRUCK AT MY LUNCH BREAK THE RPM'S GO UP TO 2000 JUST LIKE IT WAS 10 DEGREES OUTSIDE AND IF I GIVE IT A LITTLE GAS JUST LIKE YOU WOULD DO A ELECTRIC CHOKE IT DIES DOWN AND SOMETIMES DIES ALL THEY WAY WHAT IS MY PROBLEM HERE I DON'T THINK MY TRUCK SHOULD HAVE TO SIT AND WARM UP FOR 5 MIN AFTER JUST 4 HRS OF SITTING WHEN IT'S 70-80 DEGREES OUTSIDE WHAT DO YOU'LL THINK I NEED SOME ADVICE HELP

 

First, please turn your caps lock off.

Okay... it could be a few things...

Idle screw messing up the TPS
EGR
Vac leak
O2 sensor

Do you have any codes?

 

yes code 84

 

Hrm, did you find out what that number was for?